package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.Date;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //先进性密码加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //使用加密后的密码进行比对
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }
        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        //数据库存储完整对象
        Employee employee = new Employee();
        //对象拷贝
        BeanUtils.copyProperties(employeeDTO, employee);
        //设置dto没有传输的对象
        //员工账号状态，默认启用状态
        employee.setStatus(StatusConstant.ENABLE);
        //员工密码，默认使用123456加密存储，后期可以进行修改
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //存储
        employeeMapper.save(employee);
        
    }

    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //开始分页查询,传入开始记录数和每页记录总数
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        //page是mybatis框架提供的，继承了List集合本质上是一个集合
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        PageResult pageResult = new PageResult();
        pageResult.setTotal(page.getTotal());
        pageResult.setRecords(page.getResult());
        return pageResult;
    }

    /**
     * 启用禁用员工账号
     * @param status
     * @param id
     */
    @Override
    public void StartOrStop(Integer status, Long id) {
        //直接使用通用需改mapper方法传入的实体有什么字段就改什么字段
        //构建实体
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();
        //调用Mapper
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("******");
        return employee;
    }

    /**
     * 编辑员工信息
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        //将DTO对象转换为实体对象
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        //执行sql
        employeeMapper.update(employee);
    }

}
